General requirements. The Secretary shall, pursuant to section 107(f) of the Act, establish and
supervise programs for the education and training of employers and employees in the recognition, avoidance and prevention of unsafe conditions in
employments covered by the act.

The employer shall instruct each employee in the recognition and avoidance of unsafe conditions and
the regulations applicable to his work environment to control or eliminate any hazards or other exposure to illness or injury.

1926.21(b)(3)

Employees required to handle or use poisons, caustics, and other harmful substances shall be
instructed regarding the safe handling and use, and be made aware of the potential hazards, personal hygiene, and personal protective measures
required.

..1926.21(b)(4)

1926.21(b)(4)

In job site areas where harmful plants or animals are present, employees who may be exposed shall be
instructed regarding the potential hazards, and how to avoid injury, and the first aid procedures to be used in the event of injury.

1926.21(b)(5)

Employees required to handle or use flammable liquids, gases, or toxic materials shall be instructed
in the safe handling and use of these materials and made aware of the specific requirements contained in Subparts D, F, and other applicable subparts
of this part.

All employees required to enter into confined or enclosed spaces shall be instructed as to the
nature of the hazards involved, the necessary precautions to be taken, and in the use of protective and emergency equipment required. The employer
shall comply with any specific regulations that apply to work in dangerous or potentially dangerous areas.

For purposes of paragraph (b)(6)(i) of this section, "confined or enclosed space" means any
space having a limited means of egress, which is subject to the accumulation of toxic or flammable contaminants or has an oxygen deficient atmosphere.
Confined or enclosed spaces include, but are not limited to, storage tanks, process vessels, bins, boilers, ventilation or exhaust ducts, sewers,
underground utility vaults, tunnels, pipelines, and open top spaces more than 4 feet in depth such as pits, tubs, vaults, and vessels.

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